ASTM D8291 - 20

    Standard Test Method for Evaluation of Performance of Automotive Engine Oils in the Mitigation of Low-Speed, Preignition in the Sequence IX Gasoline Turbocharged Direct-Injection, Spark-Ignition Engine

    Active Standard ASTM D8291 | Developed by Subcommittee: D02.B0

    Book of Standards Volume: 05.05


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    Significance and Use

    5.1 This test method evaluates the ability of an automotive engine to mitigate preignition in the combustion chambers in turbocharged, direct injection, gasoline engines under low-speed and high-load operating conditions.

    5.2 Varying quality reference oils, with known preignition tendencies, were used in developing the operating conditions of the test procedure.

    5.3 The test method has applicability in gasoline-engine-oil specifications and is expected to be used in specifications and classifications of engine lubricating oils, such as the following:

    5.3.1 Specification D4485.

    5.3.2 ILSAC GF-6.

    5.3.3 SAE Classification J183.

    1. Scope

    1.1 This laboratory engine test evaluates the ability of an automotive engine to mitigate preignition in the combustion chambers in gasoline, turbocharged, direct-injection (GTDI) engines under low-speed and high-load operating conditions. This test method is commonly known as the Ford low-speed, preignition (LSPI) test.3

    1.1.1 In vehicles, equipped with relatively small GTDI spark-ignition engines, preignition has occasionally occurred when the vehicles are operated under low-speed and high-load conditions. Uncontrolled, preignition may cause destructive engine damage.

    1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.2.1 Exceptions—Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, tubing size, wire gauge, or specified single source equipment.

    1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D86 Test Method for Distillation of Petroleum Products and Liquid Fuels at Atmospheric Pressure

    D130 Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test

    D235 Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)

    D323 Test Method for Vapor Pressure of Petroleum Products (Reid Method)

    D381 Test Method for Gum Content in Fuels by Jet Evaporation

    D525 Test Method for Oxidation Stability of Gasoline (Induction Period Method)

    D1298 Test Method for Density, Relative Density, or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method

    D1319 Test Method for Hydrocarbon Types in Liquid Petroleum Products by Fluorescent Indicator Adsorption

    D2622 Test Method for Sulfur in Petroleum Products by Wavelength Dispersive X-ray Fluorescence Spectrometry

    D2699 Test Method for Research Octane Number of Spark-Ignition Engine Fuel

    D2700 Test Method for Motor Octane Number of Spark-Ignition Engine Fuel

    D2709 Test Method for Water and Sediment in Middle Distillate Fuels by Centrifuge

    D3120 Test Method for Trace Quantities of Sulfur in Light Liquid Petroleum Hydrocarbons by Oxidative Microcoulometry

    D3231 Test Method for Phosphorus in Gasoline

    D3237 Test Method for Lead in Gasoline by Atomic Absorption Spectroscopy

    D4485 Specification for Performance of Active API Service Category Engine Oils

    D4858 Test Method for Determination of the Tendency of Lubricants to Promote Preignition in Two-Stroke-Cycle Gasoline Engines

    D5453 Test Method for Determination of Total Sulfur in Light Hydrocarbons, Spark Ignition Engine Fuel, Diesel Engine Fuel, and Engine Oil by Ultraviolet Fluorescence

    D5892 Specification for Type IV Polymer-Modified Asphalt Cement for Use in Pavement Construction

    D6593 Test Method for Evaluation of Automotive Engine Oils for Inhibition of Deposit Formation in a Spark-Ignition Internal Combustion Engine Fueled with Gasoline and Operated Under Low-Temperature, Light-Duty Conditions

    D6984 Test Method for Evaluation of Automotive Engine Oils in the Sequence IIIF, Spark-Ignition Engine

    D8047 Test Method for Evaluation of Engine Oil Aeration Resistance in a Caterpillar C13 Direct-Injected Turbocharged Automotive Diesel Engine

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    American National Standards Institute Standards

    ANSI MC96.1 Temperature Measurement-Thermocouples


    ICS Code

    ICS Number Code 43.060.01 (Internal combustion engines for road vehicles in general)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D8291-20

    Citation Format

    ASTM D8291-20, Standard Test Method for Evaluation of Performance of Automotive Engine Oils in the Mitigation of Low-Speed, Preignition in the Sequence IX Gasoline Turbocharged Direct-Injection, Spark-Ignition Engine, ASTM International, West Conshohocken, PA, 2020, www.astm.org

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